ALM O/A/x2 User manual
ALM-010 - ‘O/A/x2’
ALM-010
‘O/A/x2’
- Operation Manual -
Introduction 3............................................................................................
Technical Specifications 3.......................................................................................
Core Operation 4.......................................................................................
Panel Layout 4.........................................................................................................
General Usage 5......................................................................................................
Limited Warranty 6.....................................................................................
Support 7....................................................................................................
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ALM-010 - ‘O/A/x2’
Introduction
‘O/A/x2’ is a dual channel attenuverter with each channel also including a bipolar
voltage offset and LED monitoring. The module is primarily intended for fine grain
flexible ‘editing’ of control signals (i.e changing the phase, level and DC offset of an LFO
signal) but also has uses with audio signals such as attenuation, inversion and mixing.
Feature list;
•Dual channel.
•Attenuate and invert input signals.
•Additional +/- 8v DC Offset controls .
•LED indication of outgoing signal polarity and level.
•A jumper setting allows for the module to also be used as a simple mixer.
•Reverse polarity protection.
•Skiff friendly.
•Designed and Made in the UK.
Technical Specifications
•Supply: +/-12V
•Current Draw: ~80ma
•Size: 4 HP
•Depth: 32mm (including power header)!
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ALM-010 - ‘O/A/x2’
Core Operation
Panel Layout
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O/A/x2
Atten
-|+
Offset
-|+
Out
In
Atten
-|+
Offset
-|+
Out
In
Offset adds or subtracts voltage (0-8v)
to the output signal.
Output signal combines both the offset
and attenuverted input signal.
LEDs indicate polarity and level.
Signal Input
Attenuverter controls
attenuation and polaration
of incoming signal
Bottom section duplicates top.
Optionally adding top output
as extra input.
ALM-010 - ‘O/A/x2’
General Usage
The O/A/x2 is split into two similar sections. For each section A signal patched into
an input be both attenuated (Atten knob full CCW is X +1) or inverted (Atten knob full
CCW is X -1) and have a DC offset added to it (Off knob full CV ~ +8v) or subtracted (Off
knob full CCV ~ -8v). Note the actual offset is not affected by the Atten control.
The LEDs indicate both the level (brightness) and polarity (red +ive, green -ive) of
the final outgoing signal.
On the rear of the module is a jumper marked ‘MIX’ - closing this jumper will
normalise the top section output to the lower section as an additional input. Thus with
no cable patched into the upper output the module can be used as a simple dual
channel mixer.
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ALM-010 - ‘O/A/x2’
Limited Warranty
From the date of manufacture this device is guaranteed for a period of 2 years
against any manufacturing or material defects. Any such defects will be repaired or
replaced at the discretion of ALM. This does not apply to;
•Physical damage arising for mistreating (i,e dropping, submerging etc).
•Damage caused by incorrect power connections.
•Overexposure to heat or direct sunlight.
•Damage caused by inappropriate or mis-use.
•Use of incorrect or non official firmware
No responsibility is implied or accepted for harm to person or apparatus caused
through operation of this product.
By using this product you agree to these terms.
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ALM-010 - ‘O/A/x2’
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